Complements

Concept Quizzes

Challenge Quizzes

Complements: Level 1 Challenges

A fruit basket contains only apples, oranges and mangos. All of the fruits are apples except four of them, all of the fruits are oranges except five of them, and all of the fruits are mangos except seven of them. How many fruits are there in the basket in all?

Alex tells the truth 70% of the time while Blake tells the truth 80% of the time, independently of each other. They are shown an apple and asked "Is it an apple or a banana?". What is the probability that they will give different answers?